libata.h revision f4d6d00466ef4879e4289f18c2f59210a06a7ada
1/* 2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved. 3 * Copyright 2003-2005 Jeff Garzik 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; see the file COPYING. If not, write to 18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 * 20 * 21 * libata documentation is available via 'make {ps|pdf}docs', 22 * as Documentation/DocBook/libata.* 23 * 24 */ 25 26#ifndef __LINUX_LIBATA_H__ 27#define __LINUX_LIBATA_H__ 28 29#include <linux/delay.h> 30#include <linux/interrupt.h> 31#include <linux/pci.h> 32#include <linux/dma-mapping.h> 33#include <asm/scatterlist.h> 34#include <linux/io.h> 35#include <linux/ata.h> 36#include <linux/workqueue.h> 37#include <scsi/scsi_host.h> 38#include <linux/acpi.h> 39 40/* 41 * Define if arch has non-standard setup. This is a _PCI_ standard 42 * not a legacy or ISA standard. 43 */ 44#ifdef CONFIG_ATA_NONSTANDARD 45#include <asm/libata-portmap.h> 46#else 47#include <asm-generic/libata-portmap.h> 48#endif 49 50/* 51 * compile-time options: to be removed as soon as all the drivers are 52 * converted to the new debugging mechanism 53 */ 54#undef ATA_DEBUG /* debugging output */ 55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 57#undef ATA_NDEBUG /* define to disable quick runtime checks */ 58 59 60/* note: prints function name for you */ 61#ifdef ATA_DEBUG 62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 63#ifdef ATA_VERBOSE_DEBUG 64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 65#else 66#define VPRINTK(fmt, args...) 67#endif /* ATA_VERBOSE_DEBUG */ 68#else 69#define DPRINTK(fmt, args...) 70#define VPRINTK(fmt, args...) 71#endif /* ATA_DEBUG */ 72 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 74 75/* NEW: debug levels */ 76#define HAVE_LIBATA_MSG 1 77 78enum { 79 ATA_MSG_DRV = 0x0001, 80 ATA_MSG_INFO = 0x0002, 81 ATA_MSG_PROBE = 0x0004, 82 ATA_MSG_WARN = 0x0008, 83 ATA_MSG_MALLOC = 0x0010, 84 ATA_MSG_CTL = 0x0020, 85 ATA_MSG_INTR = 0x0040, 86 ATA_MSG_ERR = 0x0080, 87}; 88 89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 97 98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 99{ 100 if (dval < 0 || dval >= (sizeof(u32) * 8)) 101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 102 if (!dval) 103 return 0; 104 return (1 << dval) - 1; 105} 106 107/* defines only for the constants which don't work well as enums */ 108#define ATA_TAG_POISON 0xfafbfcfdU 109 110/* move to PCI layer? */ 111static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 112{ 113 return &pdev->dev; 114} 115 116enum { 117 /* various global constants */ 118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 119 ATA_MAX_PORTS = 8, 120 ATA_DEF_QUEUE = 1, 121 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 122 ATA_MAX_QUEUE = 32, 123 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 124 ATA_MAX_BUS = 2, 125 ATA_DEF_BUSY_WAIT = 10000, 126 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 127 128 ATA_SHT_EMULATED = 1, 129 ATA_SHT_CMD_PER_LUN = 1, 130 ATA_SHT_THIS_ID = -1, 131 ATA_SHT_USE_CLUSTERING = 1, 132 133 /* struct ata_device stuff */ 134 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 135 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 136 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 137 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 138 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 140 141 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 142 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 143 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 144 145 ATA_DFLAG_DETACH = (1 << 16), 146 ATA_DFLAG_DETACHED = (1 << 17), 147 148 ATA_DEV_UNKNOWN = 0, /* unknown device */ 149 ATA_DEV_ATA = 1, /* ATA device */ 150 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 151 ATA_DEV_ATAPI = 3, /* ATAPI device */ 152 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 153 ATA_DEV_NONE = 5, /* no device */ 154 155 /* struct ata_port flags */ 156 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 157 /* (doesn't imply presence) */ 158 ATA_FLAG_SATA = (1 << 1), 159 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 160 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 161 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 162 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 163 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 164 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 165 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 166 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 167 * doesn't handle PIO interrupts */ 168 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 169 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 170 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 171 * Register FIS clearing BSY */ 172 ATA_FLAG_DEBUGMSG = (1 << 13), 173 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 175 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 176 177 /* The following flag belongs to ap->pflags but is kept in 178 * ap->flags because it's referenced in many LLDs and will be 179 * removed in not-too-distant future. 180 */ 181 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 182 183 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 184 185 /* struct ata_port pflags */ 186 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 187 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 188 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 189 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 190 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 191 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 192 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 193 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 194 195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 198 199 /* struct ata_queued_cmd flags */ 200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 206 207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 210 211 /* host set flags */ 212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 213 ATA_HOST_STARTED = (1 << 1), /* Host started */ 214 215 /* various lengths of time */ 216 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 217 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 218 ATA_TMOUT_INTERNAL = 30 * HZ, 219 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 220 221 /* ATA bus states */ 222 BUS_UNKNOWN = 0, 223 BUS_DMA = 1, 224 BUS_IDLE = 2, 225 BUS_NOINTR = 3, 226 BUS_NODATA = 4, 227 BUS_TIMER = 5, 228 BUS_PIO = 6, 229 BUS_EDD = 7, 230 BUS_IDENTIFY = 8, 231 BUS_PACKET = 9, 232 233 /* SATA port states */ 234 PORT_UNKNOWN = 0, 235 PORT_ENABLED = 1, 236 PORT_DISABLED = 2, 237 238 /* encoding various smaller bitmaps into a single 239 * unsigned int bitmap 240 */ 241 ATA_BITS_PIO = 7, 242 ATA_BITS_MWDMA = 5, 243 ATA_BITS_UDMA = 8, 244 245 ATA_SHIFT_PIO = 0, 246 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 247 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 248 249 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 250 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 251 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 252 253 /* size of buffer to pad xfers ending on unaligned boundaries */ 254 ATA_DMA_PAD_SZ = 4, 255 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 256 257 /* ering size */ 258 ATA_ERING_SIZE = 32, 259 260 /* desc_len for ata_eh_info and context */ 261 ATA_EH_DESC_LEN = 80, 262 263 /* reset / recovery action types */ 264 ATA_EH_REVALIDATE = (1 << 0), 265 ATA_EH_SOFTRESET = (1 << 1), 266 ATA_EH_HARDRESET = (1 << 2), 267 268 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 269 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 270 271 /* ata_eh_info->flags */ 272 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 273 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 274 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 275 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 276 277 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 278 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 279 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 280 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 281 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 282 283 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 284 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 285 286 /* max repeat if error condition is still set after ->error_handler */ 287 ATA_EH_MAX_REPEAT = 5, 288 289 /* how hard are we gonna try to probe/recover devices */ 290 ATA_PROBE_MAX_TRIES = 3, 291 ATA_EH_DEV_TRIES = 3, 292 293 /* Horkage types. May be set by libata or controller on drives 294 (some horkage may be drive/controller pair dependant */ 295 296 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 297 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 298 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 299 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 300 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */ 301}; 302 303enum hsm_task_states { 304 HSM_ST_IDLE, /* no command on going */ 305 HSM_ST_FIRST, /* (waiting the device to) 306 write CDB or first data block */ 307 HSM_ST, /* (waiting the device to) transfer data */ 308 HSM_ST_LAST, /* (waiting the device to) complete command */ 309 HSM_ST_ERR, /* error */ 310}; 311 312enum ata_completion_errors { 313 AC_ERR_DEV = (1 << 0), /* device reported error */ 314 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 315 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 316 AC_ERR_MEDIA = (1 << 3), /* media error */ 317 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 318 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 319 AC_ERR_SYSTEM = (1 << 6), /* system error */ 320 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 321 AC_ERR_OTHER = (1 << 8), /* unknown */ 322 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 323}; 324 325/* forward declarations */ 326struct scsi_device; 327struct ata_port_operations; 328struct ata_port; 329struct ata_queued_cmd; 330 331/* typedefs */ 332typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 333typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline); 334typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes, 335 unsigned long deadline); 336typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 337 338struct ata_ioports { 339 void __iomem *cmd_addr; 340 void __iomem *data_addr; 341 void __iomem *error_addr; 342 void __iomem *feature_addr; 343 void __iomem *nsect_addr; 344 void __iomem *lbal_addr; 345 void __iomem *lbam_addr; 346 void __iomem *lbah_addr; 347 void __iomem *device_addr; 348 void __iomem *status_addr; 349 void __iomem *command_addr; 350 void __iomem *altstatus_addr; 351 void __iomem *ctl_addr; 352 void __iomem *bmdma_addr; 353 void __iomem *scr_addr; 354}; 355 356struct ata_host { 357 spinlock_t lock; 358 struct device *dev; 359 unsigned long irq; 360 unsigned long irq2; 361 void __iomem * const *iomap; 362 unsigned int n_ports; 363 void *private_data; 364 const struct ata_port_operations *ops; 365 unsigned long flags; 366 struct ata_port *simplex_claimed; /* channel owning the DMA */ 367 struct ata_port *ports[0]; 368}; 369 370struct ata_queued_cmd { 371 struct ata_port *ap; 372 struct ata_device *dev; 373 374 struct scsi_cmnd *scsicmd; 375 void (*scsidone)(struct scsi_cmnd *); 376 377 struct ata_taskfile tf; 378 u8 cdb[ATAPI_CDB_LEN]; 379 380 unsigned long flags; /* ATA_QCFLAG_xxx */ 381 unsigned int tag; 382 unsigned int n_elem; 383 unsigned int orig_n_elem; 384 385 int dma_dir; 386 387 unsigned int pad_len; 388 unsigned int sect_size; 389 390 unsigned int nbytes; 391 unsigned int curbytes; 392 393 unsigned int cursg; 394 unsigned int cursg_ofs; 395 396 struct scatterlist sgent; 397 struct scatterlist pad_sgent; 398 void *buf_virt; 399 400 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 401 struct scatterlist *__sg; 402 403 unsigned int err_mask; 404 struct ata_taskfile result_tf; 405 ata_qc_cb_t complete_fn; 406 407 void *private_data; 408}; 409 410struct ata_port_stats { 411 unsigned long unhandled_irq; 412 unsigned long idle_irq; 413 unsigned long rw_reqbuf; 414}; 415 416struct ata_ering_entry { 417 int is_io; 418 unsigned int err_mask; 419 u64 timestamp; 420}; 421 422struct ata_ering { 423 int cursor; 424 struct ata_ering_entry ring[ATA_ERING_SIZE]; 425}; 426 427struct ata_device { 428 struct ata_port *ap; 429 unsigned int devno; /* 0 or 1 */ 430 unsigned long flags; /* ATA_DFLAG_xxx */ 431 struct scsi_device *sdev; /* attached SCSI device */ 432 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 433 u64 n_sectors; /* size of device, if ATA */ 434 u64 n_sectors_boot; /* size of ATA device at startup */ 435 unsigned int class; /* ATA_DEV_xxx */ 436 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 437 u8 pio_mode; 438 u8 dma_mode; 439 u8 xfer_mode; 440 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 441 442 unsigned int multi_count; /* sectors count for 443 READ/WRITE MULTIPLE */ 444 unsigned int max_sectors; /* per-device max sectors */ 445 unsigned int cdb_len; 446 447 /* per-dev xfer mask */ 448 unsigned int pio_mask; 449 unsigned int mwdma_mask; 450 unsigned int udma_mask; 451 452 /* for CHS addressing */ 453 u16 cylinders; /* Number of cylinders */ 454 u16 heads; /* Number of heads */ 455 u16 sectors; /* Number of sectors per track */ 456 457 /* error history */ 458 struct ata_ering ering; 459 int spdn_cnt; 460 unsigned int horkage; /* List of broken features */ 461#ifdef CONFIG_SATA_ACPI 462 /* ACPI objects info */ 463 acpi_handle obj_handle; 464#endif 465}; 466 467/* Offset into struct ata_device. Fields above it are maintained 468 * acress device init. Fields below are zeroed. 469 */ 470#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 471 472struct ata_eh_info { 473 struct ata_device *dev; /* offending device */ 474 u32 serror; /* SError from LLDD */ 475 unsigned int err_mask; /* port-wide err_mask */ 476 unsigned int action; /* ATA_EH_* action mask */ 477 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 478 unsigned int flags; /* ATA_EHI_* flags */ 479 480 unsigned int probe_mask; 481 482 char desc[ATA_EH_DESC_LEN]; 483 int desc_len; 484}; 485 486struct ata_eh_context { 487 struct ata_eh_info i; 488 int tries[ATA_MAX_DEVICES]; 489 unsigned int classes[ATA_MAX_DEVICES]; 490 unsigned int did_probe_mask; 491}; 492 493struct ata_port { 494 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 495 const struct ata_port_operations *ops; 496 spinlock_t *lock; 497 unsigned long flags; /* ATA_FLAG_xxx */ 498 unsigned int pflags; /* ATA_PFLAG_xxx */ 499 unsigned int print_id; /* user visible unique port ID */ 500 unsigned int port_no; /* 0 based port no. inside the host */ 501 502 struct ata_prd *prd; /* our SG list */ 503 dma_addr_t prd_dma; /* and its DMA mapping */ 504 505 void *pad; /* array of DMA pad buffers */ 506 dma_addr_t pad_dma; 507 508 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 509 510 u8 ctl; /* cache of ATA control register */ 511 u8 last_ctl; /* Cache last written value */ 512 unsigned int pio_mask; 513 unsigned int mwdma_mask; 514 unsigned int udma_mask; 515 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 516 unsigned int hw_sata_spd_limit; 517 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 518 519 /* record runtime error info, protected by host lock */ 520 struct ata_eh_info eh_info; 521 /* EH context owned by EH */ 522 struct ata_eh_context eh_context; 523 524 struct ata_device device[ATA_MAX_DEVICES]; 525 526 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 527 unsigned long qc_allocated; 528 unsigned int qc_active; 529 530 unsigned int active_tag; 531 u32 sactive; 532 533 struct ata_port_stats stats; 534 struct ata_host *host; 535 struct device *dev; 536 537 void *port_task_data; 538 struct delayed_work port_task; 539 struct delayed_work hotplug_task; 540 struct work_struct scsi_rescan_task; 541 542 unsigned int hsm_task_state; 543 544 u32 msg_enable; 545 struct list_head eh_done_q; 546 wait_queue_head_t eh_wait_q; 547 548 pm_message_t pm_mesg; 549 int *pm_result; 550 551 void *private_data; 552 553 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 554}; 555 556struct ata_port_operations { 557 void (*port_disable) (struct ata_port *); 558 559 void (*dev_config) (struct ata_device *); 560 561 void (*set_piomode) (struct ata_port *, struct ata_device *); 562 void (*set_dmamode) (struct ata_port *, struct ata_device *); 563 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 564 565 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 566 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 567 568 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 569 u8 (*check_status)(struct ata_port *ap); 570 u8 (*check_altstatus)(struct ata_port *ap); 571 void (*dev_select)(struct ata_port *ap, unsigned int device); 572 573 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 574 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 575 576 void (*post_set_mode) (struct ata_port *ap); 577 578 int (*cable_detect) (struct ata_port *ap); 579 580 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 581 582 void (*bmdma_setup) (struct ata_queued_cmd *qc); 583 void (*bmdma_start) (struct ata_queued_cmd *qc); 584 585 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 586 587 void (*qc_prep) (struct ata_queued_cmd *qc); 588 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 589 590 /* Error handlers. ->error_handler overrides ->eng_timeout and 591 * indicates that new-style EH is in place. 592 */ 593 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 594 595 void (*freeze) (struct ata_port *ap); 596 void (*thaw) (struct ata_port *ap); 597 void (*error_handler) (struct ata_port *ap); 598 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 599 600 irq_handler_t irq_handler; 601 void (*irq_clear) (struct ata_port *); 602 u8 (*irq_on) (struct ata_port *); 603 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 604 605 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 606 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 607 u32 val); 608 609 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 610 int (*port_resume) (struct ata_port *ap); 611 612 int (*port_start) (struct ata_port *ap); 613 void (*port_stop) (struct ata_port *ap); 614 615 void (*host_stop) (struct ata_host *host); 616 617 void (*bmdma_stop) (struct ata_queued_cmd *qc); 618 u8 (*bmdma_status) (struct ata_port *ap); 619}; 620 621struct ata_port_info { 622 struct scsi_host_template *sht; 623 unsigned long flags; 624 unsigned long pio_mask; 625 unsigned long mwdma_mask; 626 unsigned long udma_mask; 627 const struct ata_port_operations *port_ops; 628 irq_handler_t irq_handler; 629 void *private_data; 630}; 631 632struct ata_timing { 633 unsigned short mode; /* ATA mode */ 634 unsigned short setup; /* t1 */ 635 unsigned short act8b; /* t2 for 8-bit I/O */ 636 unsigned short rec8b; /* t2i for 8-bit I/O */ 637 unsigned short cyc8b; /* t0 for 8-bit I/O */ 638 unsigned short active; /* t2 or tD */ 639 unsigned short recover; /* t2i or tK */ 640 unsigned short cycle; /* t0 */ 641 unsigned short udma; /* t2CYCTYP/2 */ 642}; 643 644#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 645 646extern const unsigned long sata_deb_timing_normal[]; 647extern const unsigned long sata_deb_timing_hotplug[]; 648extern const unsigned long sata_deb_timing_long[]; 649 650extern const struct ata_port_operations ata_dummy_port_ops; 651extern const struct ata_port_info ata_dummy_port_info; 652 653static inline const unsigned long * 654sata_ehc_deb_timing(struct ata_eh_context *ehc) 655{ 656 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 657 return sata_deb_timing_hotplug; 658 else 659 return sata_deb_timing_normal; 660} 661 662static inline int ata_port_is_dummy(struct ata_port *ap) 663{ 664 return ap->ops == &ata_dummy_port_ops; 665} 666 667extern void sata_print_link_status(struct ata_port *ap); 668extern void ata_port_probe(struct ata_port *); 669extern void __sata_phy_reset(struct ata_port *ap); 670extern void sata_phy_reset(struct ata_port *ap); 671extern void ata_bus_reset(struct ata_port *ap); 672extern int sata_set_spd(struct ata_port *ap); 673extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param, 674 unsigned long deadline); 675extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param, 676 unsigned long deadline); 677extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline); 678extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 679 unsigned long deadline); 680extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 681 unsigned long deadline); 682extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 683 unsigned long deadline); 684extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 685extern void ata_port_disable(struct ata_port *); 686extern void ata_std_ports(struct ata_ioports *ioaddr); 687#ifdef CONFIG_PCI 688extern int ata_pci_init_one (struct pci_dev *pdev, 689 const struct ata_port_info * const * ppi); 690extern void ata_pci_remove_one (struct pci_dev *pdev); 691#ifdef CONFIG_PM 692extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 693extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 694extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 695extern int ata_pci_device_resume(struct pci_dev *pdev); 696#endif 697extern int ata_pci_clear_simplex(struct pci_dev *pdev); 698#endif /* CONFIG_PCI */ 699extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 700extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 701 const struct ata_port_info * const * ppi, int n_ports); 702extern int ata_host_start(struct ata_host *host); 703extern int ata_host_register(struct ata_host *host, 704 struct scsi_host_template *sht); 705extern int ata_host_activate(struct ata_host *host, int irq, 706 irq_handler_t irq_handler, unsigned long irq_flags, 707 struct scsi_host_template *sht); 708extern void ata_host_detach(struct ata_host *host); 709extern void ata_host_init(struct ata_host *, struct device *, 710 unsigned long, const struct ata_port_operations *); 711extern int ata_scsi_detect(struct scsi_host_template *sht); 712extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 713extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 714extern void ata_sas_port_destroy(struct ata_port *); 715extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 716 struct ata_port_info *, struct Scsi_Host *); 717extern int ata_sas_port_init(struct ata_port *); 718extern int ata_sas_port_start(struct ata_port *ap); 719extern void ata_sas_port_stop(struct ata_port *ap); 720extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 721extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 722 struct ata_port *ap); 723extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 724extern int sata_scr_valid(struct ata_port *ap); 725extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 726extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 727extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 728extern int ata_port_online(struct ata_port *ap); 729extern int ata_port_offline(struct ata_port *ap); 730#ifdef CONFIG_PM 731extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 732extern void ata_host_resume(struct ata_host *host); 733#endif 734extern int ata_ratelimit(void); 735extern int ata_busy_sleep(struct ata_port *ap, 736 unsigned long timeout_pat, unsigned long timeout); 737extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 738extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 739 void *data, unsigned long delay); 740extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 741 unsigned long interval_msec, 742 unsigned long timeout_msec); 743extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 744 745/* 746 * Default driver ops implementations 747 */ 748extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 749extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 750extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 751extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 752extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 753extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 754extern u8 ata_check_status(struct ata_port *ap); 755extern u8 ata_altstatus(struct ata_port *ap); 756extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 757extern int ata_port_start (struct ata_port *ap); 758extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 759extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 760 unsigned int buflen, int write_data); 761extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 762 unsigned int buflen, int write_data); 763extern void ata_qc_prep(struct ata_queued_cmd *qc); 764extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 765extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 766extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 767 unsigned int buflen); 768extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 769 unsigned int n_elem); 770extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 771extern void ata_dev_disable(struct ata_device *adev); 772extern void ata_id_string(const u16 *id, unsigned char *s, 773 unsigned int ofs, unsigned int len); 774extern void ata_id_c_string(const u16 *id, unsigned char *s, 775 unsigned int ofs, unsigned int len); 776extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 777extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 778extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 779extern void ata_bmdma_start (struct ata_queued_cmd *qc); 780extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 781extern u8 ata_bmdma_status(struct ata_port *ap); 782extern void ata_bmdma_irq_clear(struct ata_port *ap); 783extern void ata_bmdma_freeze(struct ata_port *ap); 784extern void ata_bmdma_thaw(struct ata_port *ap); 785extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 786 ata_reset_fn_t softreset, 787 ata_reset_fn_t hardreset, 788 ata_postreset_fn_t postreset); 789extern void ata_bmdma_error_handler(struct ata_port *ap); 790extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 791extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 792 u8 status, int in_wq); 793extern void ata_qc_complete(struct ata_queued_cmd *qc); 794extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 795 void (*finish_qc)(struct ata_queued_cmd *)); 796extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 797 void (*done)(struct scsi_cmnd *)); 798extern int ata_std_bios_param(struct scsi_device *sdev, 799 struct block_device *bdev, 800 sector_t capacity, int geom[]); 801extern int ata_scsi_slave_config(struct scsi_device *sdev); 802extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 803extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 804 int queue_depth); 805extern struct ata_device *ata_dev_pair(struct ata_device *adev); 806extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 807extern u8 ata_irq_on(struct ata_port *ap); 808extern u8 ata_dummy_irq_on(struct ata_port *ap); 809extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 810extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 811 812extern int ata_cable_40wire(struct ata_port *ap); 813extern int ata_cable_80wire(struct ata_port *ap); 814extern int ata_cable_sata(struct ata_port *ap); 815extern int ata_cable_unknown(struct ata_port *ap); 816 817/* 818 * Timing helpers 819 */ 820 821extern unsigned int ata_pio_need_iordy(const struct ata_device *); 822extern int ata_timing_compute(struct ata_device *, unsigned short, 823 struct ata_timing *, int, int); 824extern void ata_timing_merge(const struct ata_timing *, 825 const struct ata_timing *, struct ata_timing *, 826 unsigned int); 827 828enum { 829 ATA_TIMING_SETUP = (1 << 0), 830 ATA_TIMING_ACT8B = (1 << 1), 831 ATA_TIMING_REC8B = (1 << 2), 832 ATA_TIMING_CYC8B = (1 << 3), 833 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 834 ATA_TIMING_CYC8B, 835 ATA_TIMING_ACTIVE = (1 << 4), 836 ATA_TIMING_RECOVER = (1 << 5), 837 ATA_TIMING_CYCLE = (1 << 6), 838 ATA_TIMING_UDMA = (1 << 7), 839 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 840 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 841 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 842 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 843}; 844 845 846#ifdef CONFIG_PCI 847struct pci_bits { 848 unsigned int reg; /* PCI config register to read */ 849 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 850 unsigned long mask; 851 unsigned long val; 852}; 853 854extern int ata_pci_init_native_host(struct ata_host *host); 855extern int ata_pci_init_bmdma(struct ata_host *host); 856extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 857 const struct ata_port_info * const * ppi, 858 struct ata_host **r_host); 859extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 860extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 861#endif /* CONFIG_PCI */ 862 863/* 864 * EH 865 */ 866extern void ata_eng_timeout(struct ata_port *ap); 867 868extern void ata_port_schedule_eh(struct ata_port *ap); 869extern int ata_port_abort(struct ata_port *ap); 870extern int ata_port_freeze(struct ata_port *ap); 871 872extern void ata_eh_freeze_port(struct ata_port *ap); 873extern void ata_eh_thaw_port(struct ata_port *ap); 874 875extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 876extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 877 878extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 879 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 880 ata_postreset_fn_t postreset); 881 882/* 883 * printk helpers 884 */ 885#define ata_port_printk(ap, lv, fmt, args...) \ 886 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 887 888#define ata_dev_printk(dev, lv, fmt, args...) \ 889 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 890 891/* 892 * ata_eh_info helpers 893 */ 894#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 895 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 896 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 897 fmt , ##args); \ 898} while (0) 899 900#define ata_ehi_clear_desc(ehi) do { \ 901 (ehi)->desc[0] = '\0'; \ 902 (ehi)->desc_len = 0; \ 903} while (0) 904 905static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 906{ 907 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 908 ehi->action |= ATA_EH_SOFTRESET; 909 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 910} 911 912static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 913{ 914 __ata_ehi_hotplugged(ehi); 915 ehi->err_mask |= AC_ERR_ATA_BUS; 916} 917 918/* 919 * qc helpers 920 */ 921static inline int 922ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 923{ 924 if (sg == &qc->pad_sgent) 925 return 1; 926 if (qc->pad_len) 927 return 0; 928 if (((sg - qc->__sg) + 1) == qc->n_elem) 929 return 1; 930 return 0; 931} 932 933static inline struct scatterlist * 934ata_qc_first_sg(struct ata_queued_cmd *qc) 935{ 936 if (qc->n_elem) 937 return qc->__sg; 938 if (qc->pad_len) 939 return &qc->pad_sgent; 940 return NULL; 941} 942 943static inline struct scatterlist * 944ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 945{ 946 if (sg == &qc->pad_sgent) 947 return NULL; 948 if (++sg - qc->__sg < qc->n_elem) 949 return sg; 950 if (qc->pad_len) 951 return &qc->pad_sgent; 952 return NULL; 953} 954 955#define ata_for_each_sg(sg, qc) \ 956 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 957 958static inline unsigned int ata_tag_valid(unsigned int tag) 959{ 960 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 961} 962 963static inline unsigned int ata_tag_internal(unsigned int tag) 964{ 965 return tag == ATA_MAX_QUEUE - 1; 966} 967 968/* 969 * device helpers 970 */ 971static inline unsigned int ata_class_enabled(unsigned int class) 972{ 973 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 974} 975 976static inline unsigned int ata_class_disabled(unsigned int class) 977{ 978 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 979} 980 981static inline unsigned int ata_class_absent(unsigned int class) 982{ 983 return !ata_class_enabled(class) && !ata_class_disabled(class); 984} 985 986static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 987{ 988 return ata_class_enabled(dev->class); 989} 990 991static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 992{ 993 return ata_class_disabled(dev->class); 994} 995 996static inline unsigned int ata_dev_absent(const struct ata_device *dev) 997{ 998 return ata_class_absent(dev->class); 999} 1000 1001/* 1002 * port helpers 1003 */ 1004static inline int ata_port_max_devices(const struct ata_port *ap) 1005{ 1006 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1007 return 2; 1008 return 1; 1009} 1010 1011 1012static inline u8 ata_chk_status(struct ata_port *ap) 1013{ 1014 return ap->ops->check_status(ap); 1015} 1016 1017/** 1018 * ata_ncq_enabled - Test whether NCQ is enabled 1019 * @dev: ATA device to test for 1020 * 1021 * LOCKING: 1022 * spin_lock_irqsave(host lock) 1023 * 1024 * RETURNS: 1025 * 1 if NCQ is enabled for @dev, 0 otherwise. 1026 */ 1027static inline int ata_ncq_enabled(struct ata_device *dev) 1028{ 1029 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1030 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1031} 1032 1033/** 1034 * ata_pause - Flush writes and pause 400 nanoseconds. 1035 * @ap: Port to wait for. 1036 * 1037 * LOCKING: 1038 * Inherited from caller. 1039 */ 1040 1041static inline void ata_pause(struct ata_port *ap) 1042{ 1043 ata_altstatus(ap); 1044 ndelay(400); 1045} 1046 1047 1048/** 1049 * ata_busy_wait - Wait for a port status register 1050 * @ap: Port to wait for. 1051 * @bits: bits that must be clear 1052 * @max: number of 10uS waits to perform 1053 * 1054 * Waits up to max*10 microseconds for the selected bits in the port's 1055 * status register to be cleared. 1056 * Returns final value of status register. 1057 * 1058 * LOCKING: 1059 * Inherited from caller. 1060 */ 1061 1062static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1063 unsigned int max) 1064{ 1065 u8 status; 1066 1067 do { 1068 udelay(10); 1069 status = ata_chk_status(ap); 1070 max--; 1071 } while (status != 0xff && (status & bits) && (max > 0)); 1072 1073 return status; 1074} 1075 1076 1077/** 1078 * ata_wait_idle - Wait for a port to be idle. 1079 * @ap: Port to wait for. 1080 * 1081 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1082 * Returns final value of status register. 1083 * 1084 * LOCKING: 1085 * Inherited from caller. 1086 */ 1087 1088static inline u8 ata_wait_idle(struct ata_port *ap) 1089{ 1090 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1091 1092 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1093 if (ata_msg_warn(ap)) 1094 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1095 status, ap->ioaddr.status_addr); 1096 } 1097 1098 return status; 1099} 1100 1101static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1102{ 1103 qc->tf.ctl |= ATA_NIEN; 1104} 1105 1106static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1107 unsigned int tag) 1108{ 1109 if (likely(ata_tag_valid(tag))) 1110 return &ap->qcmd[tag]; 1111 return NULL; 1112} 1113 1114static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1115 unsigned int tag) 1116{ 1117 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1118 1119 if (unlikely(!qc) || !ap->ops->error_handler) 1120 return qc; 1121 1122 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1123 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1124 return qc; 1125 1126 return NULL; 1127} 1128 1129static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1130{ 1131 memset(tf, 0, sizeof(*tf)); 1132 1133 tf->ctl = dev->ap->ctl; 1134 if (dev->devno == 0) 1135 tf->device = ATA_DEVICE_OBS; 1136 else 1137 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1138} 1139 1140static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1141{ 1142 qc->dma_dir = DMA_NONE; 1143 qc->__sg = NULL; 1144 qc->flags = 0; 1145 qc->cursg = qc->cursg_ofs = 0; 1146 qc->nbytes = qc->curbytes = 0; 1147 qc->n_elem = 0; 1148 qc->err_mask = 0; 1149 qc->pad_len = 0; 1150 qc->sect_size = ATA_SECT_SIZE; 1151 1152 ata_tf_init(qc->dev, &qc->tf); 1153 1154 /* init result_tf such that it indicates normal completion */ 1155 qc->result_tf.command = ATA_DRDY; 1156 qc->result_tf.feature = 0; 1157} 1158 1159static inline int ata_try_flush_cache(const struct ata_device *dev) 1160{ 1161 return ata_id_wcache_enabled(dev->id) || 1162 ata_id_has_flush(dev->id) || 1163 ata_id_has_flush_ext(dev->id); 1164} 1165 1166static inline unsigned int ac_err_mask(u8 status) 1167{ 1168 if (status & (ATA_BUSY | ATA_DRQ)) 1169 return AC_ERR_HSM; 1170 if (status & (ATA_ERR | ATA_DF)) 1171 return AC_ERR_DEV; 1172 return 0; 1173} 1174 1175static inline unsigned int __ac_err_mask(u8 status) 1176{ 1177 unsigned int mask = ac_err_mask(status); 1178 if (mask == 0) 1179 return AC_ERR_OTHER; 1180 return mask; 1181} 1182 1183static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1184{ 1185 ap->pad_dma = 0; 1186 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1187 &ap->pad_dma, GFP_KERNEL); 1188 return (ap->pad == NULL) ? -ENOMEM : 0; 1189} 1190 1191static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1192{ 1193 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1194} 1195 1196static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1197{ 1198 return *(struct ata_port **)&host->hostdata[0]; 1199} 1200 1201#endif /* __LINUX_LIBATA_H__ */ 1202